# Alternatives to JetBrains AI

> Source: https://theagentsindex.com/jetbrains-ai-assistant/alternatives/ (re-verified)
> Updated: 24 October 2026

## At a glance

| Name | Best for | Starts at | Better than JetBrains AI at | Checked |
| --- | --- | --- | --- | --- |
| [JetBrains AI](https://theagentsindex.com/jetbrains-ai-assistant.md) | JetBrains IDE users who want several coding agents under one governed subscription | Free, then about $11/seat/month | — | 24 October 2026 |
| [Factory](https://theagentsindex.com/factory-ai.md) | Engineering organizations that want AI agents handling more of the SDLC than code generation alone (triage, testing, release and documentation) and are willing to pay enterprise pricing for deployment flexibility and compliance controls. | From $20/month | Debugs and fixes, In a browser | 2 September 2026 |
| [OpenCode](https://theagentsindex.com/opencode.md) | Developers who want a genuinely free, fully open-source coding agent that works with any model provider, including their own local Ollama models, without being locked into one vendor's terminal tool. | Free, then $10/month | Debugs and fixes, In a browser | 21 October 2026 |
| [Aider](https://theagentsindex.com/aider.md) | Developers who want free, model-agnostic AI pair programming in their terminal | Free | Debugs and fixes, Self-hosted | 30 September 2026 |
| [Muse Code](https://theagentsindex.com/muse-code.md) | Cost-sensitive teams willing to trade code privacy for Contributor tier's roughly 12x cheaper input and 21x cheaper output, or anyone with a large multi-part refactor that benefits from several sub-agents working in parallel isolated worktrees. | From $5/month | Debugs and fixes, API access | 20 September 2026 |
| [Junie](https://theagentsindex.com/junie.md) | Developers and teams already standardized on a JetBrains IDE who want an agent that shares the same debugger, project index, and version control already built into their editor. | Free, then about $11/seat/month | Debugs and fixes, API access | 18 September 2026 |
| [Letta](https://theagentsindex.com/letta.md) | Developers and researchers who specifically need an agent whose memory, skills and identity genuinely persist and evolve across long-running sessions, rather than reset on every call. | Free, then $20/month | Debugs and fixes, In a browser | 2 September 2026 |
| [Google Antigravity CLI](https://theagentsindex.com/antigravity-cli.md) | Developers already inside the Google ecosystem (Google AI subscription, GCP billing) who want a free terminal agent with Gemini, Claude and gpt-oss model access, especially anyone migrating off a now-sunset Gemini CLI workflow. | Free, then $30/seat/month | Debugs and fixes | 22 October 2026 |

“About” figures are converted at the European Central Bank rate of 23 October 2026.

## What to watch for

- **Factory**: No free tier or trial — the cheapest plan is $20/month.
- **OpenCode**: The web UI's server-URL-override feature and local HTTP server have a real, disclosed 2026 security history (two now-patched advisories), so running it on a shared or untrusted network needs care.
- **Aider**: Usage numbers like 44K GitHub stars, 6.8M installs, 15B tokens/week and the 88% 'Singularity' metric are self-reported on aider.chat; independent verification of these figures was not found.
- **Muse Code**: Three observer agents (memory, skill, goal) run by default and add their own billed model calls on top of the main session, switchable in settings.json under runtime_capabilities.
- **Junie**: Credit-based pricing shared across all JetBrains AI features makes the effective monthly cost of regular agentic use harder to predict than a flat subscription.
- **Letta**: Smaller ecosystem and community than LangChain, LlamaIndex or Microsoft AutoGen.
- **Google Antigravity CLI**: Not yet open source. No LICENSE file in its public GitHub repo, unlike the Apache-2.0 Gemini CLI it replaces, and Google has not confirmed whether that will change.

The ones people open most here come first, then the closest matches.

## Shortlist

### 1. Factory

Droid coding agents that run in the desktop app, CLI, IDEs, CI and Factory-managed cloud computers.

**Where it improves on JetBrains AI:**
- [Debugs and fixes: yes — Documented flows include fixing a named bug and repairing failing tests under autonomy levels.](https://docs.factory.ai/droid-exec/overview)
- [In a browser: yes — Sessions sync to app.factory.ai in any browser, with nothing to install.](https://docs.factory.ai/)
- [API access: yes — Public REST API at api.factory.ai with bearer keys covers sessions, computers, org, service accounts, CI automations and wiki; TypeScript and Python SDKs exist.](https://docs.factory.ai/api-reference)

**Trade-offs against JetBrains AI:**
- [Free tier: no — Every priced plan on the page is paid: the ladder runs 01 Pro at $20/mo to 06 Enterprise, with no $0 tier and no trial named anywhere on it, so the cheapest way in is a self-serve $20 monthly subscription. Free usage appears only inside paid plans - a BYOK allowance and a free switch to Droid Core after a rate limit.](https://factory.com/pricing)
- [Pooled budget: partial — Teams seats each keep their own Pro rate limits; Business and Enterprise usage is shared across the workspace.](https://docs.factory.ai/pricing/organizations)
- [Admin controls: partial — Org-managed settings cap autonomy and restrict models, MCP servers, commands and network; listed from Business upward, with full controls on Enterprise.](https://factory.com/pricing)

[View Factory](https://theagentsindex.com/factory-ai)

### 2. OpenCode

Open source AI coding agent for the terminal, desktop, IDE and browser, with any LLM provider.

**Where it improves on JetBrains AI:**
- [Debugs and fixes: yes — Can investigate a reported failure and land the fix: in GitHub it triages an issue, then works in a branch and opens a pull request.](https://opencode.ai/docs/github/)
- [In a browser: yes — A browser interface is served by the local binary, bound to localhost by default and optionally exposed on the network with basic auth.](https://opencode.ai/docs/web/)
- [Self-hosted: yes — The agent runs on your own machine or server with no vendor backend in the path, and enterprises can point it at an internal AI gateway only.](https://opencode.ai/docs/enterprise/)

**Trade-offs against JetBrains AI:**
- [Whole-codebase work: partial — Built for multi-step work across a repository through subagents and LSP loading, but the docs describe no repository-wide index or migration guarantee, so scale rests on agent orchestration.](https://opencode.ai/docs/agents/)
- [Seat model: partial — The gateway charges no seat fee at any team size, so seats only appear in the unpriced enterprise agreement, which is quoted rather than published.](https://opencode.ai/docs/enterprise/)
- [Opt out of training: partial — Paid gateway models carry a zero-retention, no-training commitment, but several free and stealth models explicitly may use your data to improve the model.](https://opencode.ai/v2/docs/console/models/)

[View OpenCode](https://theagentsindex.com/opencode)

### 3. WTAgent

Open-source CLI that drives your existing ChatGPT, Claude or DeepSeek web session as a local coding agent.

**Where it improves on JetBrains AI:**
- [Debugs and fixes: yes — The documented V1 loop runs builds, tests and linters, reads errors from the output and keeps editing until verification passes.](https://github.com/XiXian42/wtagent/blob/main/docs/technical-design.md)
- [Self-hosted: yes — Everything but the chat itself runs on your own machine: files are created and commands executed locally by the installed CLI.](https://xixian42.github.io/wtagent/)
- [Getting out: yes — There is nothing to export from a vendor: session state, event logs and tool output are plain JSON and JSONL files on your own disk.](https://github.com/XiXian42/wtagent/blob/main/docs/technical-design.md)

**Trade-offs against JetBrains AI:**
- [Runs autonomously: partial — Reads, writes and ordinary project commands run automatically, but a human must sign in to the web AI first and approve anything sensitive or destructive.](https://github.com/XiXian42/wtagent/blob/main/docs/technical-design.md)
- [Agent permissions: partial — A local policy engine grades every tool call by risk: reads, writes and builds inside the project run unattended, sensitive or destructive calls need approval.](https://github.com/XiXian42/wtagent/blob/main/docs/technical-design.md)
- [Open models: partial — Providers include DeepSeek, Kimi and GLM, whose weights are published openly, but WTAgent drives their hosted web chat rather than running any weights locally.](https://github.com/XiXian42/wtagent#quick-start)

[View WTAgent](https://theagentsindex.com/wtagent)

### 4. Aider

Open-source terminal AI pair programmer that edits files in your local git repo and commits the changes.

**Where it improves on JetBrains AI:**
- [Debugs and fixes: yes — It runs your lint and test commands after edits and iterates on the failures it sees, so a diagnosed failure is followed by an attempted fix rather than only a report.](https://aider.chat/docs/usage/lint-test.html)
- [Self-hosted: yes — Aider is installed on your own machine with pip, uv, pipx or Docker and edits files in your local repo, so there is no vendor runtime to depend on.](https://aider.chat/docs/install.html)
- [Getting out: yes — Nothing is locked in a vendor store: edits land as commits in your own git repo and the chat transcript is a plain markdown file you can copy, and there are no credits that could expire.](https://aider.chat/docs/faq.html)

**Trade-offs against JetBrains AI:**
- [Writes tests: partial — The vendor advertises asking it for test cases, but every documented testing feature is about running your existing test command and repairing failures, not a dedicated test-generation workflow.](https://aider.chat/)
- [Reviews code: partial — Review works by piping a diff into the chat yourself with /run git diff or --read and then asking in ask mode; there is no pull-request integration that reviews someone else's diff automatically.](https://aider.chat/docs/faq.html)
- [Whole-codebase work: partial — A ranked map of the whole git repo gives it repository-wide context, but the vendor warns performance is not optimised for very large monorepos and only one repo can be open at a time.](https://aider.chat/docs/faq.html)

[View Aider](https://theagentsindex.com/aider)

### 5. Muse Code

Meta's terminal and CI coding agent, built on the Muse Spark model.

**Where it improves on JetBrains AI:**
- [Debugs and fixes: yes — The vendor positions debugging as a core job alongside building, and the agent can run test suites and summarise failures headlessly.](https://dev.meta.ai/lp/muse-code)
- [API access: yes — Beyond the CLI, a versioned session protocol plus a published TypeScript SDK lets your own program drive a Muse Code session; the underlying model is separately callable over the Model API.](https://dev.meta.ai/docs/muse-code)

**Trade-offs against JetBrains AI:**
- [Reviews code: partial — Review happens inside its own runs — background reviewer and verification agents check the work — rather than as a review of a diff someone else wrote in a pull request.](https://dev.meta.ai/lp/muse-code)
- [Whole-codebase work: partial — It splits a large job across parallel subagents with optional Git worktree isolation, which fits a repository-wide migration, but the vendor documents no repository indexing and caps a tree at eight concurrent agents by default.](https://dev.meta.ai/docs/muse-code/extending)
- [Claude: no — The plan table and the model-ID pricing enumerate only Muse Spark; no third-party model is offered inside Muse Code.](https://developer.meta.com/ai/resources/blog/build-with-muse-code/)

[View Muse Code](https://theagentsindex.com/muse-code)

### 6. Junie

JetBrains coding agent for the terminal, JetBrains IDEs and CI, running on hosted or your own model keys.

**Where it improves on JetBrains AI:**
- [Debugs and fixes: yes — It goes past reading a stack trace: a dedicated debug mode drives a live debugger, sets breakpoints and evaluates expressions, though that mode needs a connected JetBrains IDE to work.](https://junie.jetbrains.com/docs/junie-cli-debug-mode.html)
- [API access: yes — You drive it from your own stack through the headless CLI with an API-key token, plus an ACP mode and a GitHub Action; there is no REST API for the agent itself.](https://junie.jetbrains.com/docs/junie-headless.html)

**Trade-offs against JetBrains AI:**
- [Pooled budget: partial — It splits: the included allowance is per seat and resets per seat, while separately purchased top-up credits are pooled across the organisation's licences.](https://lp.jetbrains.com/ai-ides-faq/)
- [Admin controls: partial — A developer can constrain the agent locally through the allowlist file on any tier, but organisation-wide policy such as company MCP rules is an enterprise capability.](https://www.jetbrains.com/ide-services/ai-enterprise/)
- [Single sign-on: partial — SAML-style single sign-on with SCIM provisioning is real but sits behind the enterprise tier; the free and individual paid plans are crossed out on that row.](https://www.jetbrains.com/ai-ides/buy/)

[View Junie](https://theagentsindex.com/junie)

### 7. Kilo Code

Open source AI coding agent for VS Code, JetBrains, CLI and cloud, with 500+ models at provider rates.

**Where it improves on JetBrains AI:**
- [Debugs and fixes: yes — Debug mode reads errors, traces the issue and proposes the fix.](https://kilo.ai/)
- [In a browser: yes — Cloud Agents are driven from a browser dashboard, and there is a Slack surface.](https://kilo.ai/)
- [MCP server: yes — First-class MCP client with a marketplace and private org servers.](https://kilo.ai/)

**Trade-offs against JetBrains AI:**
- [Agent permissions: partial — Auto-approve exists, but the OS-level sandbox that bounds it is experimental and Linux/macOS only.](https://kilo.ai/enterprise)
- [Admin controls: partial — Teams gets data-privacy controls on models and providers; allowlists, RBAC and policy enforcement are Enterprise.](https://kilo.ai/enterprise)
- [Single sign-on: partial — SAML, OIDC and SCIM provisioning are Enterprise-only.](https://kilo.ai/enterprise)

[View Kilo Code](https://theagentsindex.com/kilo-code)

### 8. Letta

Stateful agent harness, cloud and SDK for agents with persistent, git-versioned memory.

**Where it improves on JetBrains AI:**
- [Debugs and fixes: yes — Vendor states coding agents debug failures and run test suites.](https://docs.letta.com/handbook/index.md)
- [In a browser: yes — chat.letta.com serves cloud-hosted agents only; self-hosted agents are not reachable there.](https://docs.letta.com/reference/faq/index.md)
- [Self-hosted: yes — Local runtime keeps all state on-device with no account, or run the App Server via Docker, Railway or Fly.io.](https://docs.letta.com/self-hosting/index.md)

**Trade-offs against JetBrains AI:**
- [Writes tests: partial — Vendor claims agents run test suites; it never claims they author tests.](https://docs.letta.com/handbook/index.md)
- [Whole-codebase work: partial — Subagents read across large repositories and memory persists project knowledge, but no repo-wide migration claim.](https://docs.letta.com/configuration/subagents/index.md)
- [MCP server: no — MCP runs inbound only: Letta sessions consume stdio, HTTP and SSE MCP servers; no Letta MCP server is published.](https://docs.letta.com/agent-sdk/mcp/index.md)

[View Letta](https://theagentsindex.com/letta)

### 9. Google Antigravity CLI

Terminal agent (agy) that runs Google Antigravity coding agents and parallel subagents.

**Where it improves on JetBrains AI:**
- [Debugs and fixes: yes — A /boost slash command targets bugs and race conditions with multi-agent reasoning, and the best-practices guide has the agent iterate against test output until the fix holds.](https://antigravity.google/docs/cli/features)

**Trade-offs against JetBrains AI:**
- [Reviews code: partial — The diff viewer opens workspace changes, agent turns and any commit in the repository for line-level comments, but review is a human reading diffs to steer the agent; no pull-request or reviewer workflow is documented.](https://antigravity.google/docs/cli/commands/diff)
- [Runs autonomously: partial — Unattended execution is possible but off by default: the CLI ships in request-review mode and only an explicit always-proceed flag or preset removes the human from the loop.](https://antigravity.google/docs/cli/headless)
- [Agent permissions: partial — A three-list allow/ask/deny engine governs files, commands, URLs and MCP tools, but unconfigured actions default to asking, so broad autonomy requires rules you write yourself.](https://antigravity.google/docs/permissions)

[View Google Antigravity CLI](https://theagentsindex.com/antigravity-cli)